What is ptfe lined swing check valve - Knowledge

The PTFE lined swing check valve is suitable for pipelines carrying sulfuric acid, hydrochloric acid, hydrofluoric acid, aqua regia, and various organic acids, strong acids, strong oxidants, and other corrosive media of various concentrations. However, the PTFE lined valve is limited by temperature (it is only suitable for media between -50°C and 150°C).

GNEE Group supplies hundreds of types of valves, all of which meet national standards such as ASTM, JIS, EN, and GB. You are welcome to send us your drawings for custom valve customization.

Features of PTFE-lined swing check valves:

1. Suitable for general operating conditions and special operating conditions involving abrasive or highly corrosive media.

2. PTFE-lined swing check valves require no external power source, reducing operating costs.

3. Excellent backflow prevention, utilizing the elasticity of the rubber itself and the effect of reverse back pressure.

4. Opening and closing are naturally achieved through the internal and external pressure difference during operation, suitable for highly corrosive media and power plant desulfurization.

PTFE lined Swing Check Valve

Drawings for GNEE PTFE lined swing check valve. You can also send us custom drawings and we will provide you with a quote.

Standards for ptfe lined swing check valve

Standard Category	Standard Reference
‌Design and Manufacturing‌	GB12235 / GB12236
‌Structural Length‌	GB12221 / JB96 (Long and Short Series)
‌Flange Dimensions‌	JB78 / JB79 (GB, HG, SH)
‌Test Pressure‌	GB/T13927
‌Marking‌	GB12220
‌Supply‌	GB/T12252

Material list of main components of PTFE lined swing check valve:

NO.	Parts Name	Gray Cast Iron	Cast Iron	Stainless Steel		Ultra-low carbon stainless steel
NO.	Parts Name	Z	C	P	R	PL	RL
1	Valve body, valve cover	HT250	WCB	CF8	CF8M	CF3	CF3M
2	Liner/Valve Cover	Hard rubber lining(NR)FEP(F46)PCTFE(F3)PFA(Soluble polytetrafluoroethylene)
3	Shaft, valve disc (plate)	1 Cr13/35WCB 1Cr18Ni9/CF8 00Cr17Ni14Mo2/CF3M
4	Bolt	35	35	1Cr17Ni2	1Cr17Ni2	1Cr18Ni9Ti	1Cr18Ni9Ti
5	Nut	45	45	0Cr18Ni9	0Cr18Ni9	0Cr18Ni9	0Cr18Ni9

Main connection dimensions and weight of swing-type PTFE-lined check valve:

Nominal diameter		Standard value							Reference value
DN(mm)	NPS(inch)	L	D	D1	D2	f	b	Z-Φd	B	H	W(kg)
DN(mm)	NPS(inch)	PN0.6(MPa)
15	1/2	130	80	55	40	2	12	4-Φ12	105	55	4
20	3/4	150	90	65	50	2	14	4-Φ12	115	58	5
25	1	160	100	75	60	2	14	4-Φ12	128	60	6
32	1 1/4	180	120	90	70	2	16	4-Φ14	145	75	7
40	1 1/2	200	130	100	80	3	16	4-Φ14	160	82	8
50	2	230	140	110	90	3	16	4-Φ14	178	95	10
65	2 1/2	290	160	130	110	3	16	4-Φ14	205	105	20
80	3	310	185	150	125	3	18	4-Φ18	230	120	25
100	4	350	205	170	145	3	18	4-Φ18	255	135	30
125	5	400	235	200	175	3	20	8-Φ18	305	158	50
150	6	480	260	225	200	3	20	8-Φ18	345	180	65
200	8	495	315	280	255	3	22	8-Φ18	415	215	137
250	10	622	370	335	310	3	24	12-Φ18	490	240	150
300	12	698	435	395	362	4	24	12-Φ23	540	265	185
350	14	787	485	445	412	4	26	12-Φ23	585	300	215
400	16	914	535	495	462	4	28	16-Φ23	625	360	244
450	18	978	590	550	518	4	28	16-Φ23	680	385	276
500	20	978	640	600	568	4	30	16-Φ23	740	415	315

PTFE-lined valves, also known as fluoroplastic-lined corrosion-resistant valves, are made by molding (or embedding) polytetrafluoroethylene resin (or processed profiles) into the inner wall of steel or iron valve pressure-bearing components (the same method applies to the lining of various pressure vessels and pipeline accessories) or the outer surface of valve internals. This utilizes PTFE's unique resistance to highly corrosive media to create various valves and pressure vessels. Valves that can be lined with PTFE include: PTFE-lined butterfly valves, PTFE-lined ball valves, PTFE-lined gate valves, PTFE-lined diaphragm valves, PTFE-lined gate valves, PTFE-lined plug valves, PTFE-lined check valves, and PTFE-lined regulating valves. Contact us for a list of PTFE-lined valve products.